Input*: move to input/

src/input/plugins/FfmpegInputPlugin.cxx

@@ -0,0 +1,177 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/* necessary because libavutil/common.h uses UINT64_C */
+#define __STDC_CONSTANT_MACROS
+
+#include "config.h"
+#include "FfmpegInputPlugin.hxx"
+#include "../InputStream.hxx"
+#include "../InputPlugin.hxx"
+#include "util/StringUtil.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
+
+extern "C" {
+#include <libavformat/avio.h>
+#include <libavformat/avformat.h>
+}
+
+struct FfmpegInputStream {
+	InputStream base;
+
+	AVIOContext *h;
+
+	bool eof;
+
+	FfmpegInputStream(const char *uri, Mutex &mutex, Cond &cond,
+			  AVIOContext *_h)
+		:base(input_plugin_ffmpeg, uri, mutex, cond),
+		 h(_h), eof(false) {
+		base.ready = true;
+		base.seekable = (h->seekable & AVIO_SEEKABLE_NORMAL) != 0;
+		base.size = avio_size(h);
+
+		/* hack to make MPD select the "ffmpeg" decoder plugin
+		   - since avio.h doesn't tell us the MIME type of the
+		   resource, we can't select a decoder plugin, but the
+		   "ffmpeg" plugin is quite good at auto-detection */
+		base.mime = "audio/x-mpd-ffmpeg";
+	}
+
+	~FfmpegInputStream() {
+		avio_close(h);
+	}
+};
+
+static constexpr Domain ffmpeg_domain("ffmpeg");
+
+static inline bool
+input_ffmpeg_supported(void)
+{
+	void *opaque = nullptr;
+	return avio_enum_protocols(&opaque, 0) != nullptr;
+}
+
+static bool
+input_ffmpeg_init(gcc_unused const config_param &param,
+		  Error &error)
+{
+	av_register_all();
+
+	/* disable this plugin if there's no registered protocol */
+	if (!input_ffmpeg_supported()) {
+		error.Set(ffmpeg_domain, "No protocol");
+		return false;
+	}
+
+	return true;
+}
+
+static InputStream *
+input_ffmpeg_open(const char *uri,
+		  Mutex &mutex, Cond &cond,
+		  Error &error)
+{
+	if (!StringStartsWith(uri, "gopher://") &&
+	    !StringStartsWith(uri, "rtp://") &&
+	    !StringStartsWith(uri, "rtsp://") &&
+	    !StringStartsWith(uri, "rtmp://") &&
+	    !StringStartsWith(uri, "rtmpt://") &&
+	    !StringStartsWith(uri, "rtmps://"))
+		return nullptr;
+
+	AVIOContext *h;
+	int ret = avio_open(&h, uri, AVIO_FLAG_READ);
+	if (ret != 0) {
+		error.Set(ffmpeg_domain, ret,
+			  "libavformat failed to open the URI");
+		return nullptr;
+	}
+
+	auto *i = new FfmpegInputStream(uri, mutex, cond, h);
+	return &i->base;
+}
+
+static size_t
+input_ffmpeg_read(InputStream *is, void *ptr, size_t size,
+		  Error &error)
+{
+	FfmpegInputStream *i = (FfmpegInputStream *)is;
+
+	int ret = avio_read(i->h, (unsigned char *)ptr, size);
+	if (ret <= 0) {
+		if (ret < 0)
+			error.Set(ffmpeg_domain, "avio_read() failed");
+
+		i->eof = true;
+		return false;
+	}
+
+	is->offset += ret;
+	return (size_t)ret;
+}
+
+static void
+input_ffmpeg_close(InputStream *is)
+{
+	FfmpegInputStream *i = (FfmpegInputStream *)is;
+
+	delete i;
+}
+
+static bool
+input_ffmpeg_eof(InputStream *is)
+{
+	FfmpegInputStream *i = (FfmpegInputStream *)is;
+
+	return i->eof;
+}
+
+static bool
+input_ffmpeg_seek(InputStream *is, InputPlugin::offset_type offset,
+		  int whence,
+		  Error &error)
+{
+	FfmpegInputStream *i = (FfmpegInputStream *)is;
+	int64_t ret = avio_seek(i->h, offset, whence);
+
+	if (ret >= 0) {
+		i->eof = false;
+		return true;
+	} else {
+		error.Set(ffmpeg_domain, "avio_seek() failed");
+		return false;
+	}
+}
+
+const InputPlugin input_plugin_ffmpeg = {
+	"ffmpeg",
+	input_ffmpeg_init,
+	nullptr,
+	input_ffmpeg_open,
+	input_ffmpeg_close,
+	nullptr,
+	nullptr,
+	nullptr,
+	nullptr,
+	input_ffmpeg_read,
+	input_ffmpeg_eof,
+	input_ffmpeg_seek,
+};